Direct diagonalization of Fock space for an exact solution of pairing model

Details Direct diagonalization of Fock space for an exact solution of pairing model Direct diagonalization of Fock space for an exact solution of pairing model

2005-02-09

arxiv.org/abs/cond-mat/0502222v4

Phys. Lett. A, 359 (2006)p597-602

Physics

Condensed Matter

Superconductivity

6 pages, 4 figures. The published version

Scientific paper

10.1016/j.physleta.2006.07.038

We investigate the exact solution of BCS pairing model using direct diagonalization of Fock space. By the data analysis and numerical calculation, we verify the symmetry between energy spectrum of Fock subspaces, obtain the common structure features of energy gaps and energy bands in Hamiltonian spectrum of reduced model, propose the formula to estimate the lowest energy levels in all of the subspaces of reduced model, and suggest a scheme to estimate the respective energy spectrum which can reveal the structure of energy spectrum of pairing model.

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